Douglas E Stehr

Title: Douglas E. Stehr: Innovator in Electrical Systems

Introduction

Douglas E. Stehr is a notable inventor based in Hales Corner, WI (US). He has made significant contributions to the field of electrical systems, particularly in the automotive sector. With a total of 2 patents, his work focuses on enhancing safety and functionality in vehicle signaling systems.

Latest Patents

One of Stehr's latest patents is the "Electrical Malfunction Detection System." This innovative protection system utilizes a power supply connected to lamps through a low-value resistor. The resistor is part of a voltage divider system that provides input signals to several comparators. These comparators send appropriate signals to a microprocessor, indicating normal operation. When a malfunction occurs, the voltage drop across the low-value resistor changes, altering the output of the comparators. Consequently, the microprocessor generates a warning signal. This system is particularly useful in vehicle turn signal circuits, where it detects burned-out bulbs and alerts the vehicle operator. Additionally, it ensures that the remaining functioning bulbs flash at a slower rate, adhering to federal safety regulations.

Another significant patent is the "Motorcycle Turn Signal Control Circuit." This circuit includes a power source, left and right turn signal inputs, and a speed detection input. It conditions the power source voltage and current, as well as the input signals for optimal operation. When a turn signal switch is activated, the circuit begins flashing the respective turn signal. Upon releasing the switch, a microprocessor assesses the vehicle speed and references a lookup table to determine the appropriate distance to turn off the signal. The system also offers various manual cancellation options for the motorcycle operator and includes a four-way flasher system.

Career Highlights

Throughout his career, Douglas E. Stehr has worked with prominent companies, including Harley-Davidson, Inc. His experience in the industry has allowed him to develop innovative solutions that enhance vehicle safety and performance.

Collaborations

Stehr has collaborated with notable individuals such as Lance C. Onan and James R. Scholler. These partnerships have contributed to the advancement of his inventions and the successful implementation of his ideas.

Conclusion

Douglas E. Stehr is a distinguished inventor whose work in electrical systems has made a significant impact on vehicle safety and functionality. His innovative patents reflect his commitment to enhancing automotive technology.